Răspuns:
ᴀ) 7,2-1,51=5,7
5,7+2,7=8,4
B) 7,2+1,51=8,71
8,7-2,7=6
C) 7,2-151=5,69
5,69-2,7=2,99
D)7,2+1,51=8,71
8,71+2,7=11,41